FMR STUDIES OF SINGLE FE LAYERS SANDWICHED BY AG

The FMR spectrum, at X band and room temperature, of (Ag\single Fe layer\Ag) sandwiches deposited on mica is studied as a function of the dc applied field orientation. It is deduced, from the thickness dependence of the anisotropy of ultrathin Fe layers, that the interface-induced anisotropy characteristic of the (Ag\Fe) interface is essentially an easy axis perpendicular anisotropy whose effective value of the anisotropy constant is consistent with the one determined from the field position of a surface mode observed in thick Fe layers.